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Thermos Foogo Phase 3 Insulated Review

Thermos Foogo Phase 3 Insulated Straw Bottle
Top Pick Award
Price:   $18.00 List | $12.39 at Amazon - 31% off
Pros:  Stainless Steel, Insulated, attached lid, easy to use straw
Cons:  Fairly Heavy, lots of parts
Bottom line:  Great insulated Stainless Steel cup that is easy to use and clean
Editors' Rating:   
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Manufacturer Age Recommendation:  18 months+
Available Capacities (ounces):  10 oz
Empty Weight (ounces):  7.1 oz
Manufacturer:   Thermos

The Skinny

This easy to use, insulated, stainless steel sippy had a lot to offer. So much in fact that it won our Top Pick for insulated cup award, and it ranked 2nd out of 21 cups tested. This cup had an easy to drink from straw, and an attached lid that helped keep the straw clean and assisted in preventing leaks. Given that the lid was attached, it meant it was always handy, and available for use right when needed. This cup earned high scores for its stainless steel construction, silicone valve and straw, and insulating properties; and even though it was heavier than many of the other cups we tested, we felt the trade off was worth it given its overall ease of use and health considerations. We absolutely recommend this award winning cup.

RELATED REVIEW: The Best Toddler Sippy Cup Review

Our Analysis and Hands-on Test Results

Review by:
Juliet Spurrier, MD & Wendy Schmitz

Last Updated:
March 4, 2014

The Thermos Foogo Phase 3 Insulated Straw Cup is a stainless steel sippy cup with an attached lid, and straw style spout. The cup features interchangeable parts with the other lids and accessories in the Foogo lineup, so it can grow with your child, and be used for many years. The durable design and quality materials ensure it will last through those years. This cup has a push button lid mechanism that is easy for children to use without assistance, and a contoured body to help improve grip-ability by smaller hands. The insulation is sweat proof to avoid wet slippery cups, and water rings. This cup is dishwasher safe, comes in a few different styles, and is widely available in some stores and online.

Performance Comparison

A variety of Toddler Sippy Cups
A variety of Toddler Sippy Cups


There is so much to like about this cup that any description we write has us risking sounding like a love letter to Thermos. Fist we love the nostalgic sort of throw back design of this cup that takes us back to metal lunch boxes and Saturday morning cartoons. The cup has a similar shape as the Thermos containers of yore, with an updated straw and lid mechanism that makes you wonder how we ever managed with those old fashioned lids. This cup is slightly contoured to make holding it easier. The lid is always available for use, and is easy for children to work on their own. We liked the soft spout straw and the leak proof valve was easy to drink from.

Happy Toddler with Top Pick Thermos Foogo Phase 3 Insulated
Happy Toddler with Top Pick Thermos Foogo Phase 3 Insulated
We also liked the rubberized bottom of this cup that helped little ones plant the cup firmly when they set the cup down. Some of the cups we tested were difficult to put down, or were top heavy and had a tendency to tip. This cup was the exact opposite, offering a rubber bottom that sat firmly on the first try, and stubbornly resisted being accidentally knocked over with its heavier bottom construction.

This cup being made of stainless steel just upped the love affair we had started. The steel meant the cup had no possible chance of leaching chemicals, and it did not impart a metal flavor to the contents like some steel can. The overall health benefits to children, and the environment, of using stainless steel cannot be overstated and it is our material of choice, when a choice is available.

Nice straw spout  with attached lid
Nice straw spout, with attached lid
The insulating properties of this cup meant we could keep things cooler for longer periods of time, which made this an ideal cup for traveling, or taking to school and daycare. The sweat proof construction was just a bonus that helped keep everything dry and prevented accidental slippery hands dropping of this cup. Given that is was one of the heavier cups we tested, this was a good feature to have.

We also liked how easy this cup was to drink from. The easy open push button lid was a cinch to operate, and the soft flexible straw spout allowed children to easily drink from the cup, and avoid potential injuries that harder spouts can possibly lead to. It was nice that this straw could be kept clean when not in use, and that the lid offered increased leak protection that was so simple even a child could operate it.

Speaking of leaks, this cup also did well in the leak category scoring well for the side test, and just slightly lower for the upside down test. Most of the straw type cups we tested failed to be perfect when tipped upside down, so we did not view this trait as a deal breaker, so much as a product of choosing a straw over other mouthpieces. However, with the lid closed tightly, this cup did even better in the leak category, and redeemed itself in our hearts and minds.


There wasn't much to dislike about this cup, and even when we found something we felt it was workable given the cups other stellar properties. For instance the cup is fairly wide and didn't fit in most cup holders. Some auto cup holders seemed able to accommodate its size, but strollers and car seats were far to narrow to allow its squat bottom heavy design. Luckily, with its hardy construction and closable lid, we felt more confident about letting this sippy be shoved in a bag or placed on the car floor when a holder was hard to come by.

We also sort of wish this cup were lighter. While we know that would be somewhat difficult in the realm of insulated stainless steel, we still felt it is a parent's right to dream just a little bit. And while our love affair with this cup was darn near perfect, we had to reluctantly admit that not all soul mates are the best at everything.


Thermos Foogo Phase 3 Insulated has a great soft silicone straw
Thermos Foogo Phase 3 Insulated has a great soft silicone straw
We love this cup, and it ranked 2nd in our tests, which meant we had to give it the award for Top Pick for insulated sippy. This cup was easy to use, fairly easy to clean (despite multiple parts), and it did well for leaks when the lid was closed. If you're looking for an insulated sippy that also considers eco-health, it really was the best of the cups we tested scoring far better than its competitor Eco Vessel Stainless Steel Insulated Cup which scored 7 places lower and was more expensive.
Juliet Spurrier, MD & Wendy Schmitz